Integrating Cross-modality Hallucinated MRI with CT to Aid Mediastinal Lung Tumor Segmentation

  • Jiang Jue
  • Hu Jason
  • Tyagi Neelam
  • Rimner Andreas
  • Berry L. Sean
  • Deasy O. Joseph
  • Veeraraghavan HariniEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11769)


Lung tumors, especially those located close to or surrounded by soft tissues like the mediastinum, are difficult to segment due to the low soft tissue contrast on computed tomography images. Magnetic resonance images contain superior soft-tissue contrast information that can be leveraged if both modalities were available for training. Therefore, we developed a cross-modality educed learning approach where MR information that is educed from CT is used to hallucinate MRI and improve CT segmentation. Our approach, called cross-modality educed deep learning segmentation (CMEDL) combines CT and pseudo MR produced from CT by aligning their features to obtain segmentation on CT. Features computed in the last two layers of parallelly trained CT and MR segmentation networks are aligned. We implemented this approach on U-net and dense fully convolutional networks (dense-FCN). Our networks were trained on unrelated cohorts from open-source the Cancer Imaging Archive CT images (N = 377), an internal archive T2-weighted MR (N = 81), and evaluated using separate validation (N = 304) and testing (N = 333) CT-delineated tumors. Our approach using both networks were significantly more accurate (U-net \(P <0.001\); denseFCN \(P <0.001\)) than CT-only networks and achieved an accuracy (Dice similarity coefficient) of \(0.71\pm 0.15\) (U-net), \(0.74\pm 0.12\) (denseFCN) on validation and \(0.72\pm 0.14\) (U-net), \(0.73\pm 0.12\) (denseFCN) on the testing sets. Our novel approach demonstrated that educing cross-modality information through learned priors enhances CT segmentation performance.


Hallucinating MRI from CT for segmentation Lung tumors Adversarial cross-domain deep learning 



This work was supported by the MSK Cancer Center support grant/core grant P30 CA008748, and NCI R01 CA198121-03.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Jiang Jue
    • 1
  • Hu Jason
    • 1
  • Tyagi Neelam
    • 1
  • Rimner Andreas
    • 2
  • Berry L. Sean
    • 1
  • Deasy O. Joseph
    • 1
  • Veeraraghavan Harini
    • 1
    Email author
  1. 1.Medical PhysicsMemorial Sloan Kettering Cancer CenterNew YorkUSA
  2. 2.Radiation OncologyMemorial Sloan Kettering Cancer CenterNew YorkUSA

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